Zhang Jianwu, Lyu Gang, Ma Zhiqiang, Ma Chao
College of Intelligent Manufacturing Modern Industry (School of Mechanical Engineering), Xinjiang University, Urumqi 830017, P. R. China.
Department of Orthopedics, Affiliated Traditional Chinese Medicine Hospital of Xinjiang Medical University, Urumqi 830099, P. R. China.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2025 Apr 25;42(2):351-358. doi: 10.7507/1001-5515.202408037.
This article aims to compare and analyze the biomechanical differences between wing-shaped titanium plates and traditional titanium plates in fixing acetabular anterior column and posterior hemi-transverse (ACPHT) fracture under multiple working conditions using the finite element method. Firstly, four sets of internal fixation models for acetabular ACPHT fractures were established, and the hip joint stress under standing, sitting, forward extension, and abduction conditions was calculated through analysis software. Then, the stress of screws and titanium plates, as well as the stress and displacement of the fracture end face, were analyzed. Research has found that when using wing-shaped titanium plates to fix acetabular ACPHT fractures, the peak stress of screws decreases under all working conditions, while the peak stress of wing-shaped titanium plates decreases under standing and sitting conditions and increases under forward and outward extension conditions. The relative displacement and mean stress of the fracture end face decrease under all working conditions, but the values are higher under forward and outward extension conditions. Wing-shaped titanium plates can reduce the probability of screw fatigue failure when fixing acetabular ACPHT fractures and can bear greater loads under forward and outward extension conditions, improving the mechanical stability of the pelvis. Moreover, the stress on the fracture end surface is more conducive to stimulating fracture healing and promoting bone tissue growth. However, premature forward and outward extension rehabilitation exercises should not be performed.
本文旨在运用有限元方法，比较和分析翼形钛板与传统钛板在多种工况下固定髋臼前柱和后半横行（ACPHT）骨折时的生物力学差异。首先，建立了四组髋臼ACPHT骨折内固定模型，并通过分析软件计算了站立、坐立、前伸和外展工况下的髋关节应力。然后，分析了螺钉和钛板的应力以及骨折端面的应力和位移。研究发现，使用翼形钛板固定髋臼ACPHT骨折时，在所有工况下螺钉的峰值应力均降低，而翼形钛板的峰值应力在站立和坐立工况下降低，在前伸和外展工况下升高。骨折端面的相对位移和平均应力在所有工况下均降低，但在前伸和外展工况下数值更高。翼形钛板在固定髋臼ACPHT骨折时可降低螺钉疲劳失效的概率，且在前伸和外展工况下能承受更大载荷，提高骨盆的力学稳定性。此外，骨折端面上的应力更有利于刺激骨折愈合和促进骨组织生长。然而，不应过早进行前伸和外展康复锻炼。
